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Finding the Fourth Proportional to 529.92, 731.52 and 374.40

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Solution

The fourth proportional to 529.92, 731.52 and 374.40 is: 516.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.92 : 731.52 = 374.40 : x
  2. Step 2: Convert to fraction form
    529.92/731.52 = 374.40/x
  3. Step 3: Cross multiply
    529.92x = 731.52 × 374.40
  4. Step 4: Simplify right side
    529.92x = 273,881.09
  5. Step 5: Solve for x
    x = 273,881.09/529.92
  6. Step 6: Final answer
    x = 516.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.